Hair dryer



FIG. 1 is a right side elevation of a hair dryer, showing my new design, the left side being a mirror image of the side shown;

FIG. 2 is a rear elevation thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a front elevation thereof . 

The ornamental design for a hair dryer, as shown and described. 